magnometer sensors

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daverave:
anyone got any speake magnometers for sale and also the circuit board to use two sensors.

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GoldDigger1950:
What are Speake magnatometers? Is that a brand name?

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daverave:
Speake is a UK brand name for a certain type of magnometer sensor.

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GoldDigger1950:
Thank you.

Now that we have that established, what part number are you looking for?

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Homefire:
This what your on about ?    FGM-series - Speake Sensors
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The FGM-X series of devices are very high sensitivity magnetic field sensors ... typical period swing for the full range of an FGM-3 is from 8.5 µs to 25 µs (~120 ...

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daverave:
im after a couple of second hand FGM-3 sensors...and also the circuit as designed by Carl Morland.

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Homefire:
   Farrite Rod with a few hundred winds of #32 AWG wire fed into a Op Amp in differential Mode does the job.

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